Preserve unmodelled keys at the document, settings, nested settings, and migration levels when an older desktop build writes known settings.
Validate known fields independently and keep the public DesktopSettings value limited to fields this build understands.
Restore desktop notification sounds by default, add a persisted Play sound setting, and group notification permission and testing in a dedicated Notifications section.
Quitting the desktop app now shuts down the daemon it started, so
"restart the app" is a complete reset users can act on without first
learning what a daemon is. The old default kept it alive; the toggle
under Settings > Host still opts back in.
Existing installs already persisted `keepRunningAfterQuit: true` from
the old default, so a new default alone would only reach fresh installs.
A one-time migration resets it, and an explicit toggle afterwards
persists the migration flag and is never overridden again.
Only a desktop-managed daemon is stopped — one started with
`paseo daemon start` is left alone.
Move daemon management and release channel settings out of the renderer's
AsyncStorage and into a desktop-owned settings store persisted by the main
process. Adds a "Keep daemon running after quit" option, a daemon lifecycle
section in settings, and a one-time migration of legacy renderer-owned
desktop settings.
Christoph Leiter